Seasonal cycle of water balance in major river basins, 1979-1993 mean (2)

Calculated from river discharge and "ERA15" meteorolgical data
Huang He (Yellow) ---------- Amur (Heilong Jiang) ---------- Lena

(S is shown as relative values, whose minimum being zero.)
In mid-latitude East Asia, S takes maximum in autumn.
In cold region, S takes maximum at the season of snowmelt.
The Amur river basin has both characters mixed.